They were on their final approach to Scotland’s Glasgow airport when an unidentified object passed within 300 feet of the Airbus A320 passenger jet. “Er yeah we just had something pass underneath us quite close [1255:30] and nothing on TCAS have you got anything on in our area” said the pilot to Glasgow tower, reports the BBC.

The TCAS’ of which the pilot mentions is the A320’s Traffic Collision Avoidance System, which communicates with other aircraft, several times per second, alerting two aircraft that are dangerously close to each other. The system was silent as the A320 was preparing to land, in clear conditions, at an altitude of about 4,000 feet. It was then that the pilot and non-flying pilot saw an object about 300 feet (100 meters) ahead.

Described as “blue and yellow or silver in color with a small frontal area, but ‘bigger than a balloon,’ the object moved quickly and came so close to the A320 that the pilot filed a near-miss report with authorities.Glasgow air traffic control said that while there were no other objects in the area of the A320 at the time, they did have an “unidentified track history” 1.3 nautical miles east of the A320’s position 28 seconds earlier.

Not likely another aircraft, glider, hang-glider, para-motor, para-glider, hot-air balloon or helicopter – all of which would have shown up on radar. The object is still unidentified.

Radio 5 presenter Mike Sewell says he was driving early this morning about 15 miles from Stansted Airport in Hertfordshire, England, when a bright light descended towards the road before banking to the left and then circling over a field. It was disc shaped with several lights flashing around the edge. During the interview, UFO expert Timothy Good said he “knew for a fact” that experimental spacecraft have been developed with the help of aliens, and that this might be one of them.

Sewell doesn’t mention taking any photographs with his mobile phone, and of course Good doesn’t give any hard evidence to back up his claim. So could this be a hoax? I doubt Sewell would stick his professional neck out by lying to reporters from his own news agency. Perhaps he hallucinated? Perhaps it was some strange electrical phenomenon?

The proximity to Stansted raises the possibility that it was indeed some sort of experimental aircraft, but we don’t have to go so far as Good does and spin tales about aliens. I met a reporter who once saw what he was convinced was a UFO flying over the New Mexico desert. He described it as a black triangle unlike any aircraft he had ever seen. He became a UFO believer until the first photos of the Stealth bomber were released, and then he knew what he had seen.

Have you ever had a strange encounter near an airport? Tell us what you saw in the comments section!

[Photo of “unusual atmospheric occurrence observed over Sri Lanka” courtesy UK Ministry of Defence. This is not the object Sewell claims to have seen.]